/**
 * @file build a production output of all of our bundles.
 * @see dist/dist/bundled
 */
import './setup'
import webpack from 'webpack'
import { getConfig } from '../../config/oneConfig/getConfigForEnv'
import { Configuration } from '../../typings'
import { deleteDist } from '../utils'
import { webpackConfigFactory } from './webpackConfigFactory'

export function bundle() {
  const optimize = process.env.OPTIMIZE !== undefined
  const ENV_INFRA = process.env.CI !== undefined

  const bundles = getConfig('bundles')
  const buildOutputPath = process.env.BUNDLE_SERVER_OUTPUT_PATH_ABSOLUTE
  const bundleNames = Object.keys(bundles)

  deleteDist(buildOutputPath)

  const configs = bundleNames
    .map((bundleName: 'client' | 'server') => {
      const webpackConfig = webpackConfigFactory({
        target: bundleName,
        optimize,
      })
      // webpack validates all keys, this will make it hidden
      Object.defineProperty(webpackConfig, 'named', {
        enumerable: false,
        value: bundleName,
      })
      return webpackConfig
    })
    .map((bundleConfig: Configuration) => {
      bundleConfig.watch = false

      /**
       * @todo this works in webpack 4.5...
       * @see https://webpack.js.org/concepts/mode
       * @todo @fixme @perf @prod !!!!!!! THIS IS DISABLED BECAUSE THE TREE SHAKING IS MAKING SOME EXPORTS UNDEFINED
       */
      bundleConfig.mode = 'none'
      // bundleConfig.mode = 'production'
      // bundleConfig.mode = 'development'

      return { ...bundleConfig }
    })

  // require('fliplog').data(configs).bold('bundle configs:').echo()

  const compiler = webpack(configs)

  // # @todo load argv into dotenv
  // # --optimize
  // # --optimize-occurrence-order
  // # --optimize-minimize
  // # --profile
  // # --verbose
  // # --display-reasons
  // # --display-error-details
  // # --display-modules
  // # --display-exclude
  // # --display-chunks
  // # --display=verbose
  // # --progres
  console.log('begining the build...')
  compiler.run((compilationError, stats) => {
    if (compilationError) {
      throw compilationError
    }

    if (ENV_INFRA) {
      console.log('minimal logs for CI')
    } else {
      const json = stats.toJson({
        reasons: true,
        errors: true,
        modules: true,
        exclude: true,
        chunks: true,
        verbose: true,
        debug: true,
        providedExports: false,
        usedExports: true,
        maxModules: 1000,
      })

      require('fliplog')
        .json(json)
        .bold('STATS')
        .echo()
      console.log(stats.toString({ colors: true }))

      require('../shell/build_prod_post')
    }
  })
}